For Americans (excluding South America. South America is not America and Canadians are not Americans either):

This is a post (a picture with text written on it) of a European dog who puts his or her head out of the car of the window, while the car is travelling at different speeds.
Notice how it starts with a low speed, ending up with a high speed and the dog's face looks funnier as the car accelerates (increases speed).

On the content the person who made it uses km to denote speed. Kilometers are a unit of distance as in the road is 10 kilometers long. Speed or velocity on the other hand is distance/time, and thus the content should say km/h instead of just km.